Nicknames for Preston

The family I nanny for is having a baby and his name is going to be Preston. I was wondering if there were any nicknames that I was missing aside from the obvious Pres... I figured if there were any more nicknames that the good people of nameberry would be the ones to find them. :-)

My dog's name is Preston Meyers after the main character in the movie Can't Hardly Wait. I know it's different having a person vs a dog named Preston, but when he's doing something good I always say Prest is the Best or I say Presty is my besty (like best friend) haha. Other nicknames I call him that would be appropriate for a child would be Presty, and I call him Stone too.